package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.service.ShoppingCartService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {


    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;
    @Autowired
    private OrderService orderService;


    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        // 处理各种异常情况
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }


        // 查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        // 2、向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getDetail());
        orders.setUserId(userId);
        orderMapper.insert(orders);
        List<OrderDetail> orderDetailList = new ArrayList<>();
        // 3、向订单明细表 插入多条数据
        for(ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId()); // 设置当前订单明细关联 的订单 id
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        // 4、清空当前用户的 购物车
        shoppingCartMapper.deleteByUserId(userId);

        // 5、封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                 .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );

        // 这里是为了 跳过 微信支付验证

        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        // 为完善 微信支付成功后的 数据库订单 状态更新
        paySuccess(ordersPaymentDTO.getOrderNumber());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */

    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 通过 websocket 向 客户端浏览器 推送消息 type orderId content
//        Map map = new HashMap();
//        map.put("type",1);
//        map.put("orderId",orders.getId());
//        map.put("content","订单号："+outTradeNo);
//        webSocket

        // 通过webscoket 向客户端 推送消息
        Map map =  new HashMap<>();
        map.put("type", 1);  // 1 表示来单提醒 2 表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content","订单号："+ outTradeNo);

        String json =  JSON.toJSONString(map);

        webSocketServer.sendToAllClient(json);

    }

    @Override
    public PageResult page4User(int pageNum,int pageSize,Integer status) {
        PageHelper.startPage(pageNum,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();
        // 查询订单明细 封装进orderVo
        if(page != null && page.getTotal() > 0){
            for(Orders orders :page){
                Long orderId =orders.getId();
                // 查询历史订单
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }

        return new PageResult(page.getTotal(),list);

    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void cancelorders(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        // 检验订单是否存在
        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);

        }
        if(ordersDB.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单属于 待接单状态下要退款
        if(ordersDB.getStatus() == Orders.TO_BE_CONFIRMED){

            // 这里直接设置支付状态
            orders.setPayStatus(Orders.REFUND);
        }
        // 更细状态

        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消订单");
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

    /**
     * 订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {

        Orders orders = orderMapper.getById(id);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 封装到 OrderVO
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);


        return orderVO;
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 当前用户id
        Long userId = BaseContext.getCurrentId();
        // 根据订单 id 查询 订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 将 订单详情 封装为 购物车 对象

        // 忘了
        List<ShoppingCart> shoppingCartList  = orderDetailList.stream().map(x->{
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);

    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态 需要额外返回 订单菜品信息 将Orders 转化 为 ordersVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }

    @Override
    public OrderStatisticsVO statistics() {
        Long userId = BaseContext.getCurrentId();
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
//        Orders orders = orderMapper.getById(ordersConfirmDTO.getId());
//        orders.setStatus(Orders.CONFIRMED);
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 查看订单状态 是不是 待接单
        Orders order = orderMapper.getById(ordersRejectionDTO.getId());
        if(order == null || !order.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 支付状态
        if(order.getPayStatus() == Orders.PAID){
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    order.getNumber(),
//                    order.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款：{}",order.getAmount());
        }
        Orders orders = Orders.builder()
                .id(order.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {

        // 设置取消原因
        Orders order = orderMapper.getById(ordersCancelDTO.getId());
        if(order.getPayStatus() == Orders.PAID){
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    order.getNumber(),
//                    order.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款{}",order.getAmount());
        }
        Orders orders = Orders.builder()
                .id(ordersCancelDTO.getId())
                .status(Orders.CANCELLED)
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);



        // 如果已经付款 还有退款

    }

    @Override
    public void delivery(Long id) {
        Orders orderDB = orderMapper.getById(id);
        if(orderDB == null || !orderDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(orderDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);

    }

    @Override
    public void complete(Long id) {
        Orders orderDB = orderMapper.getById(id);
        if(orderDB == null || !orderDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(orderDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);
    }

    @Override
    public void reminderOrder(Long id) {
        Orders orderDB = orderMapper.getById(id);
        if(orderDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map =  new HashMap<>();
        map.put("type", 2);  // 1 表示来单提醒 2 表示客户催单
        map.put("orderId",orderDB.getId());
        map.put("content","订单号："+ orderDB.getNumber());
        String json =  JSON.toJSONString(map);

        webSocketServer.sendToAllClient(json);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回 订单菜品信息

        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> orderList = page.getResult();
        if(!CollectionUtils.isEmpty(orderList)){
            for(Orders orders:orderList){
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishes(orders);

                // 将订单菜品 封装到 orderVO 并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    private String getOrderDishes(Orders orders) {
        // 查询订单菜品详细信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单 菜品信息 拼接为 字符串 ’菜品 * 菜品数量‘
        List<String> orderDishesList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" +x.getNumber() ;
            return orderDish;
        }).collect(Collectors.toList());

        return String.join("",orderDishesList);
    }


}
